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webDav.go
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webDav.go
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package main
import (
"flag"
"fmt"
"log"
"net/http"
"os"
"golang.org/x/net/context"
"golang.org/x/net/webdav"
)
var (
flagRootDir = flag.String("dir", "", "webdav root dir")
flagHttpAddr = flag.String("http", ":80", "http or https address")
flagHttpsMode = flag.Bool("https-mode", false, "use https mode")
flagCertFile = flag.String("https-cert-file", "cert.pem", "https cert file")
flagKeyFile = flag.String("https-key-file", "key.pem", "https key file")
flagUserName = flag.String("user", "", "user name")
flagPassword = flag.String("password", "", "user password")
flagReadonly = flag.Bool("read-only", false, "read only")
)
func init() {
flag.Usage = func() {
fmt.Fprintf(os.Stderr, "Usage of WebDAV Server\n")
flag.PrintDefaults()
}
}
func main() {
flag.Parse()
fs := &webdav.Handler{
FileSystem: webdav.Dir(*flagRootDir),
LockSystem: webdav.NewMemLS(),
}
http.HandleFunc("/", func(w http.ResponseWriter, req *http.Request) {
if *flagUserName != "" && *flagPassword != "" {
username, password, ok := req.BasicAuth()
if !ok {
w.Header().Set("WWW-Authenticate", `Basic realm="Restricted"`)
w.WriteHeader(http.StatusUnauthorized)
return
}
if username != *flagUserName || password != *flagPassword {
http.Error(w, "WebDAV: need authorized!", http.StatusUnauthorized)
return
}
}
if req.Method == "GET" && handleDirList(fs.FileSystem, w, req) {
return
}
if *flagReadonly {
switch req.Method {
case "PUT", "DELETE", "PROPPATCH", "MKCOL", "COPY", "MOVE":
http.Error(w, "WebDAV: Read Only!!!", http.StatusForbidden)
return
}
}
fs.ServeHTTP(w, req)
})
if *flagHttpsMode {
http.ListenAndServeTLS(*flagHttpAddr, *flagCertFile, *flagKeyFile, nil)
} else {
http.ListenAndServe(*flagHttpAddr, nil)
}
}
func handleDirList(fs webdav.FileSystem, w http.ResponseWriter, req *http.Request) bool {
ctx := context.Background()
f, err := fs.OpenFile(ctx, req.URL.Path, os.O_RDONLY, 0)
if err != nil {
return false
}
defer f.Close()
if fi, _ := f.Stat(); fi != nil && !fi.IsDir() {
return false
}
dirs, err := f.Readdir(-1)
if err != nil {
log.Print(w, "Error reading directory", http.StatusInternalServerError)
return false
}
w.Header().Set("Content-Type", "text/html; charset=utf-8")
fmt.Fprintf(w, "<pre>\n")
for _, d := range dirs {
name := d.Name()
if d.IsDir() {
name += "/"
}
fmt.Fprintf(w, "<a href=\"%s\">%s</a>\n", name, name)
}
fmt.Fprintf(w, "</pre>\n")
return true
}